Two factors appear to be generating the cycle: food plants and predators.
产生这种循环的因素有两个：食用植物和食肉动物。
According to the study, two factors were important for lake formation in the Empty Quarter: first the rains that fell there were torrential.
根据这项研究，有两个因素对“空白之地”湖泊的形成很重要：首先，那里的降雨十分猛烈。
Thus both factors can affect the cycle, which, in practice, seems to be generated by conjunction of the two factors.
因此，这两个因素都会影响周期；而实际上，周期似乎是由这两个因素的结合产生的。
Isoquant curve is a line showing all the alternative combinations of two factors that can produce a given level of output.
等产量线是表示两种生产要素的不同数量组合可以带来相等产量的一条曲线。
A new study finds that there are two factors at work: the knowledge of where the sound is coming from and the unfortunate design of our ear canals.
一项新的研究发现，有两个因素在发挥作用：一个是听众对于声音来源的认识，另一个是我们耳道那种令人遗憾的形状。
Two factors affect an eclipse's color and brightness, says the astronomy magazine Sky &Telescope.
据天文杂志《天空与望远镜》影响月食颜色和亮暗的因素有两个。
These two factors limit the success and cost effectiveness of this approach as a long term solution.
这两个因素会限制此方法作为长期解决方案的成功和高效性。
All the time these two factors affect each other, that is why smiling when sad makes you happier and it is why you laugh when you find something funny.
这两项因素一直都是互相影响的，这就是为什么难受的时候微笑会使你开心些，同样也说明了为什么当发现有趣的事情时你会大笑。
This tremendous saving of storage stems from two factors.
能够大量节省存储空间源自两个因素。
Two factors that once supported the link between business growth and job growth have fundamentally changed.
曾经支撑着价值的创造和工作岗位关系的两个重要因素已经根本上发生了改变。
TWO factors determine the price of a barrel of oil: the fundamental laws of supply and demand, and naked fear.
两个因素决定着每桶油的价格：供需的基本法则以及表露无遗的恐慌。
These two factors are used differently among the dictionary building interfaces.
在不同的字典构建接口中，这两个因素的用法不同。
And I assume that this is due to two factors: competition from other sites, and the increasing sophistication of merchants themselves about the possibilities of these sites.
我认为这里有两方面的因素：来自其他团购网站的竞争，以及供货商本身对于此类网站的精明估算。
There are two factors accounting for these changes.
造成这些变化的因素有两个。
Two factors can explain the unusually rapid decline in unemployment.
造成失业率不正常下降的因素主要有两个。
A homeowner's property tax was determined by two factors. One was the tax rate, the other the assessed value of the house to which the rate was applied.
一个房产拥有者的财产税由两个因素决定：一个是税率，另一个是税率所针对的房产的估价。
But two factors have made it hard for Airbus and Boeing to continue sitting on their hands.
但是有两个因素使得波音和空客很难继续坐以待毙。
Over the fierce opposition of prosecutors, the judge allowed Bernet to testify in court that these two factors help explain why Waldroup snapped that murderous night.
不顾检察官的激烈反对，法官允许贝内在法庭上作证，解释为什么这两个因素使沃尔德鲁普在那个杀人夜“突然抓狂”，犯下令人发指的暴行。
But neither of those two factors would stop a gold rally if the EU can't get to grips with the debt crisis, he added.
不过他还说，如果欧盟无法控制住债务危机，上述两个因素就都阻止不了金价的飙升。
From the water standpoint, two factors play a role: global warming, and a change in moisture or water availability.
从水资源角度讲，有两大因素会产生影响：一是全球变暖，二是湿度或水资源可用量的变化。
It's clear that two factors increase overall primate life expectancy.
很明显有两个因素延长了灵长类动物总体的寿命。
These last two factors mean that offshoring will be a hugely disruptive force, says Alan Blinder, a professor at Princeton University.
普林斯顿大学教授阿兰·布林德表示，上面所述的后两个因素意味着境外生产将成为一种巨大的破坏力量。
Those two factors combined mean that you're more likely to lose weight by following these eating tips.
结合这两项因素，就是说，根据上述饮食小窍门，更有可能减肥。
On top of these two factors we also have to take into account people's innate ability.
除这两个因素以外，我们还必须考虑人的先天能力。
Two factors make Egypt different from Tunisia.
有两个因素使得埃及与突尼斯有所不同。
Two factors make Egypt different from Tunisia.
有两个因素使得埃及与突尼斯有所不同。
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